In a trial with 2 x 3 lactating cows, the effect of an organic (ORG) trace element supplement (BIOPLEX Cu, Mn, Zn and SEL-PLEX*) on performance and selected metabolic parameters was investigated in comparison to inorganic sources (INORG). Cu sulfate, Mn oxide, Zn oxide and Na selenite served as inorganic trace element sources. The experimental diet consisted of hay, corn silage fed ad libitum and concentrates distributed according to milk yield. At the end of the experimental period, the cows were slaughtered, liver, kidneys and phalanx proximalis were removed.<br>Animals of the two treatments INORG and ORG neither differed in milk yield (INORG 24.4, ORG 25.1 kg ECM milk/day) nor in milk composition (fat, protein, Cu, Mn, Zn, Se) including somatic cell count. Furthermore, no difference was observed for Cu, Mn, Zn and Se concentration in the liver, kidney, outer hair and phalanx proximalis. The metabolic profile did not reveal any significant treatment effects either.<br>*ALLTECH INC. KY, USA
While botanical composition, growth cycle and phenological stage are integral factors, they are not the sole determinants of the quality of grass silages from intensively managed permanent meadows.
Food that is unsuitable for human consumption does not affect the growth performance or carcass composition of pigs to which it is fed. This makes it a promising solution for reducing food waste.
Horses are ridden or driven on a variety of surfaces, which differently absorb the impact forces exerted on hooves, limbs and the horse's entire body. Objective measurement of the functional properties of equestrian arena surfaces is therefore of great importance.